Google Maps Extended Plugin : DeleteAllMarkers throws an error only on Firefox

Hello,

We encounter an error when calling the GoogleMapsExtended Plugin ‘DeleteAllMarkers’ function only on Firefox (works fine on Chrome).

This is the error we get :

The plugin Google Maps Extended / action Delete All Markers a Maps Extended threw the following error: deleteMarkerCluster@PLUGIN_1479901297703x967536405834891300/Google-Maps-Extended-element_action--Maps-Extended-Delete-All-Markers-.js:3:519
anonymous@PLUGIN_1479901297703x967536405834891300/Google-Maps-Extended-element_action--Maps-Extended-Delete-All-Markers-.js:3:648
create_code/<@https://app.xxx.fr/package/run_js/8f0962e4021a0e284924a232c63c22d90c50600dbcddfae72e1ccd0f708f2bdc/xfalse/x29/run.js:267:330 (please report this to the plugin author)

Does anyone have the same kind of issue and would know how to solve it ?